If you avg will not remove it then get an online scan to do it from Housecall or Panda.
here is the link to housecall..
http://housecall.trendmicro.com/housecall/start_corp.aspAVG comes up with some weird names for Trojan and some times they are just malware or spyware..so unless you can tell me where on your pc AVG called out this one..and it path and name of the file..can not help you much..if you have Win Me or XP clean out your Temporary Internet File and your system Restore folder and see if it goes away.